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Akai cassette deck GXC-725D playback only on one channel


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  • Eddie Edwards
    Eddie Edwards Dec 06, 2012




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  • Audio Player... Master
  • 1,267 Answers

Clean switches, check head wiring if it is a three head deck and then there could be bad relay contacts, defective electrolytic capacitors and even a malfunction in a muting circuit. That is why there are no easy answer but to get in with a scope and find out where the signal stops.

Posted on Dec 10, 2012


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Posted on Jan 02, 2017

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SOURCE: Motor for Akai GXC-740D Casette Deck

Hi pelagic

The motor is probably faulty. The heat is a give away for that. Many motors for older decks can still be sourced. Can you see what part numbers may be on the back plate of the motor and I can find a source for you. Awaiting your reply


Posted on Sep 11, 2008

  • 8546 Answers


Is it electronic or mechanical? The left channel is the physical outer edge of the tape. It's more sensitive to damage and sloppy contact with the heads. If you can see a wave in light reflected off the tape it's probably shot.

When's the last time you cleaned the heads?

Posted on Jan 28, 2010

  • 5384 Answers

SOURCE: my sony cassette deck will

Chances are there is a fault on the right channel. It could be caused by a faulty switch or a wire off on the tape head. Lastly a fault in the electronics.

Posted on Dec 03, 2010

  • 11800 Answers

SOURCE: I have a Marantz PMD510 dual cassette deck. Both

There are no fuses in this unit. The decks can't read or record because either the connection switches from the heads to the boards have failed or the power source is no longer active.
You will need to locate the switch by following the data cable coming from the heads and determine why it has failed and how it can be fixed. Then check the connections from the switch to the signal board. Finally check the power : the output of the transformer and the filtering and stabilization stages.

Posted on Aug 16, 2011

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1 Answer

Playback low in one channel in reverse playback only forward playback fine. unit has been cleaned and lubed

Hard to say, but the three leading suspects would be:
  • dirty relay or switch (whatever switches between the forward and reverse heads)
  • bad head (so worn that one channel just doesn't produce as much signal)
  • bad electrolytic capacitor in the reverse-head preamp
None of these qualifies as a quick fix and all of them would require an oscilloscope or high-sensitivity amplifier for troubleshooting.

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manual looks like its available here. you have to register but its free

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1) Clean the heads real well using denature alcohol. If this does not fix it then try spraying the record play switches with Deoxit contact cleaner. After that it could be the well known Akai garbage transistors that a Technician will need to change.

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The electronics in that channel are failing, the intermittent scratchy sound is classic symptoms of internal transistors failing in manner called 'thermal runaway'. If I am right it probably works better when its cold and gets worse as it warms up, and when you turn up the volume. It will be cheaper to replace the appliance than repair it. Buy the cheapest supermarket item you can, because any appliance that takes in optical disks will not last more than a few years, usually they stop playing discs before the electronics fail.

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Akai cassette deck GXC-725D

It could be head dirt, bad switches, broken head wire or electronics problem. A Technician or you if you know electronics will need to get into it further to find where the problem is. There si no magic wand except some alcohol and a Q tip if the heads are dirty.

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My sony cassette deck will only playback recording on the left channel

Chances are there is a fault on the right channel. It could be caused by a faulty switch or a wire off on the tape head. Lastly a fault in the electronics.

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Won't record and play sounds muffled

Muffled sound is either damaged media (is it mostly the Left Channel? Multiple tapes or not?) or dirty Playback Head. Clean the heads and transport.

Please define better what "won't record" means. Tapes to be recorded need to have the little tab in the corner of the cassette shell present to allow the machine to enter record mode.

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